Hmm all of them are popular with the Inklings, but we're forgetting who could possibly be the most interesting character.
Just think about it, look at this from the tumblr.
and this
Jellyfish may be looked down upon by the Inklings, cause they don't speak their language and can't produce ink. Jelonzo used his gift to become popular among the Inklings, and join the higher ups by the creating the level system, the Inklings follow tons of trends so Jelonzo made a system in which you can't have the latest clothes unless you perform better in turf battles, other sea creatures (sea anemones and shrimp, maybe sea urchin) may have come from neighboring countries and found work using the leveling system, or we're over-thinking it.